The given phrase as expression is 
Evaluate when x = 5 is 46
<em><u>Solution:</u></em>
Given that we have to write the phrase as an expression
Given phrase is:
6 more than the product of 8 and a number x
Here " more than " represents "addition" and "product" means multiplication
Therefore,
6 + product of 8 and a number x

<em><u>So the required expression is:</u></em>

<em><u>Evaluate when x = 5</u></em>
Substitute x = 5 in above expression

Thus value when x = 5 is 46